In 1960, scientist Mayman developed the ruby laser, since then, the laser is applied to various fields, it has been applied to medicine, military, industry and other fields. For example, in medicine, there are three main types of applications: laser life science research, laser diagnosis and laser therapy; in industry, lasers are also used in a wide range of applications, such as for laser cloud measurement, laser spectroscopy and laser sensors. The field of laser applications is constantly expanding, for which it is particularly important to detect laser parameters, and a large part of these lasers is concentrated in the infrared band.
Laser detection requires the capture and analysis of the laser spot shape and the changes in the laser emission information after the optical path system, which is characterized by invisibility (infrared laser) and high frequency, requiring infrared cameras and ultra-high speed cameras for detection and analysis.
As short-wave infrared cameras are becoming more powerful and their technology is becoming more sophisticated, this has brought optical information acquisition and processing to a new level. Therefore, designing an image acquisition and processing system based on modern optics and short-wave infrared sensors as image acquisition tools and applying them to laser spot detection will greatly improve the speed and accuracy of laser spot detection.
Although traditional optical measuring instruments are resistant to interference, traditional optical instruments are not conducive to automated inspection because they require manual human adjustment of the workpiece position. With the rapid development of short-wave infrared detection technology and computer technology in recent years, inspection systems based on short-wave infrared cameras have been very well used. There are many advantages of using this method for optical aspects of inspection, such as fast beam detection, strong anti-interference, and high stability. At the same time, it can also avoid the problems of poor automated test procedures and difficult traditional optical programming.
1. High recognition
Short-wave infrared lens imaging is mainly based on the principle of target reflected light imaging, its imaging and visible grayscale image characteristics are similar, high contrast imaging, clear expression of target details, in terms of target identification, short-wave infrared lens imaging is a complement to thermal imaging technology;
2. all-weather adaptation
short-wave infrared lens imaging by atmospheric scattering effect is small, through smoke, fog or haze ability is strong, the effective detection distance is far, the adaptation to climate conditions and battlefield environment is significantly better than visible light imaging;
3. micro-light night vision
In the night vision conditions of atmospheric glow, photon irradiance is mainly distributed in the SWIR band range of 1.0-1.8um, which makes the short-wave infrared lens imaging has advantages compared to visible light night vision imaging; can extract image details from deeper shadows and can penetrate window glass for imaging, especially suitable for use in dark places or at night.
4. Stealth active imaging
In the 0.9-1.7um band, the laser light source technology is mature (1.06um, 1.55um), which makes short-wave infrared lens imaging in covert active imaging applications has a significant comparative advantage;
5. easy optical configuration
Short-wave infrared lens light can penetrate glass, short-wave infrared lens imaging camera does not require a special housing, as long as the assembly of a protective window glass can be, when applied to a specific platform or occasion, has great flexibility.
